A backlink is a link on another website that points to a page on yours. In SEO, backlinks are treated as evidence that people outside your own site consider the linked page worth pointing to — one of the oldest ranking signals still in active use.
Every backlink works two ways at once. To a person clicking it, it’s a recommendation: this page is worth visiting. To a search engine crawling it, it’s closer to a vote — an outside site choosing to associate itself with your page. That second reading, an outside source vouching for you rather than you describing yourself, is why backlinks earned a permanent place in ranking systems, and why most off-site SEO work is really backlink work in one form or another.
What Counts as a Backlink?
Technically, any external link pointing to a URL on your site counts as a backlink. In practice, a few specific parts of it determine how much it’s worth:
. The clickable, visible text of the link. “Miss Pepper AI’s guide to backlinks” tells a reader and a search engine more about the destination than “click here” does.
Referring page and referring domain. The specific page a link sits on, and the domain it belongs to. One site can link to you from several pages — each is its own backlink, but they share one referring domain (more on why that matters below).
Placement. Whether a link sits inside a page’s actual content or in a sitewide element like a footer or nav menu repeated on every page. In-content links are generally treated as stronger signals than sitewide ones.
Link attribute. An HTML tag — `rel=”nofollow”`, `rel=”sponsored”`, `rel=”ugc”`, or none at all — that hints at the nature of the link, covered below.
Why Do Backlinks Matter for SEO?
The core idea goes back to the earliest version of Google’s ranking approach, which treated links as votes — a vote from an important page counting for more than one from an obscure page. That logic, trust passed from one site to another, is still recognizable in how search engines evaluate pages today, even as the systems on top of it have grown far more sophisticated.
Google has said publicly that backlinks remain one of many ranking signals, not the only one, and that its systems try to set aside low-quality or spammy links rather than punish a site over them in isolation. In practice, backlinks matter in a few distinct ways:
They signal authority. A page that earns links from a range of credible, relevant sites is harder to fake than one that simply claims expertise on itself.
They help search engines discover content. Crawlers find new pages partly by following links from pages they already know about — a page with no incoming links anywhere on the web is simply harder to find.
They can send direct traffic. Separate from any ranking effect, a backlink on a page people actually read will send visitors who click through, whether or not it moves rankings at all.
What Makes a Backlink High-Quality vs. Low-Quality?
Not all backlinks carry the same weight, and “more backlinks” on its own isn’t the goal — relevant, credible ones are.
Relevance. A link from a site that covers a related topic or serves a related audience tells search engines more than a link from an unrelated site picked at random.
Authority of the linking site. Sites that are themselves well-established and widely referenced tend to pass more weight through their links. Third-party tools score this with metrics like “” or “Domain Rating” — useful for comparison, but these are the tool makers’ own scoring systems, not figures Google publishes or uses directly.
How the link was placed. A link a writer added because your page was genuinely useful is worth more than one you bought, traded, or inserted into a low-effort directory.
Referring domains over raw link count. Ten links from ten different, credible websites are generally worth more than fifty links from one site, because each new domain is a separate, independent vote rather than a repeat of the same one.
Dofollow, Nofollow, and the Newer Link Attributes
By default, a link passes what SEOs commonly call “link equity” — some of the linking page’s authority — to the page it points to. The `rel=”nofollow”` attribute, originally introduced so site owners could mark links they didn’t want to vouch for (blog comments, forum signatures, paid placements), tells search engines not to treat the link as an endorsement.
In 2019, Google added two more attributes: `rel=”sponsored”` for paid or advertising links, and `rel=”ugc”` for links inside user-generated content like comments and forum posts. It also described all three — nofollow included — as hints rather than strict rules, meaning its systems may still weigh such links as one signal among many. That’s a shift from the older idea that nofollow links “don’t count for anything” — they still shouldn’t be the deliberate target of a backlink strategy, but “worth zero” isn’t quite accurate anymore.
A natural link profile — one nobody engineered — usually includes a mix of both, because that’s simply how links occur across the open web.
Backlinks vs. Internal Links
They’re easy to blur, but they do different jobs. A backlink comes from a site you don’t control and works as outside validation. An internal link connects two of your own pages and works as structure, showing how your content relates and where the important pages sit. You can fix an internal link any time, since you own both ends — a genuine backlink can’t be manufactured the same way, because its value depends on coming from somewhere you don’t own.
How Backlinks Get Earned — and How They Get Abused
Earned, editorial links happen when someone links to your page because it answered their question or supported something they were writing — a journalist citing a source, a blogger referencing a useful guide, another business pointing to a resource page. These are generally the most durable kind, because no one had to be paid or asked.
Outreach and contributed content — guest posts, expert quotes, and similar efforts — aim to earn that same kind of editorial link more deliberately. The tactics involved are their own subject; see What Is Link Building in SEO? for how that process works.
Directory and listings, more relevant to local businesses than most other sources, can be genuine and useful — low-quality submissions built purely for the link add little.
Paid and manipulated links — buying links, large-scale link exchanges, automated schemes built purely to influence rankings — sit outside what search engines treat as a legitimate signal. Google’s guidelines list this as manipulation that can lead to a ranking demotion if identified, and the company has also run algorithm updates aimed at reducing the impact of manipulative link-building.
Unwanted or toxic links can point at your site with no involvement from you — competitors, scrapers, and spam networks sometimes link to sites they have no relationship with. Google Search Console’s disavow tool exists for this, though it’s worth using cautiously and mainly for a clear problem like a manual action, since Google generally recognizes and sets aside low-quality links on its own.
If you’re handling this alongside the rest of your site’s SEO yourself, see How to Do SEO Yourself. If you’re weighing whether to hand it off, backlink work is typically one piece of a broader SEO service, not something sold on its own.
How Backlinks Show Up in AI-Driven Search
Backlinks are a Google ranking signal by design; whether AI answer engines — Google’s , ChatGPT, Perplexity — weigh links the same way isn’t something these companies have detailed, so it’s worth avoiding too direct a line between the two. What does seem to hold: content that’s already earned enough credible outside links to be well-established tends to read as trustworthy and well-sourced to an AI system summarizing a topic, too — both downstream of the same thing, whether credible sources treat your content as worth referencing.
Common Questions
How many backlinks do I need to rank?
There’s no fixed number, and any specific figure you see quoted elsewhere is a rough rule of thumb at best. It depends on how competitive the keyword is, how strong your site and content already are, and how many backlinks the pages currently ranking have built up. A handful of relevant, credible links regularly outperforms a large pile of weak ones.
Is it bad to have nofollow backlinks?
No. A natural link profile includes both dofollow and nofollow links, and since 2019 Google has treated nofollow as a hint rather than a strict rule, meaning nofollow links may still carry some signal. They’re just not something you’d typically build a deliberate backlink strategy around.
What’s the difference between a backlink and a referring domain?
A backlink is a single link. A referring domain is the website that link comes from. One domain can send several backlinks from different pages, but they only count as one referring domain — which is why SEO tools report both numbers separately.
Can I get rid of backlinks I don’t want?
You can ask the linking site to remove it, or use Google Search Console’s disavow tool to tell Google not to count the link. Disavowing is generally reserved for clear cases — a manual action, or an obvious negative SEO attempt — rather than routine cleanup, since Google has said it’s generally able to identify and discount low-quality links on its own.
Do backlinks still matter in 2026?
Yes, though their relative weight alongside other ranking signals has shifted as search engines got better at evaluating content directly. Backlinks remain one of the signals used, particularly for competitive queries, but they’ve never been the only one — strong links rarely make up for weak content.